Get invitee information into Player Welcome in Nextjs

[ty730]

Problem

We need to show information for the invitee (challenger who invited the player) on the player welcome page in our Nextjs migration branch. However, we have not yet set up interfacing with the Firebase database, so this data is not currently accessible by the player welcome page. Pull Request #225 migrated the player welcome page visually, but the data for the invitee is not getting fetched and shown from the database.

Figma example of how the invitee data will be displayed:

Goal

In the Nextjs branch create a way to interface with the Firebase database and pull the invitee data into the player welcome page to display.

Additional context

Interfacing with the Firebase database in Nextjs will probably be part of another issue, but wanted to create this issue to call out that the database data needs to get pulled into the player welcome page specifically.